Underground -- formerly known as Z-Axis -- was acquired by Activision back in 2002, and was renamed to Underground just last month. The studio worked on the Dave Mirra BMX series, the Aggressive Inline series, and was notably the developer of the shudder-inducing BMX XXX. Most recently, the studio completed work on X-Men 3: The Last Stand, and the port of Enemy Territories: Quake Wars for the Playstation 3, due out in May.